(精)图像在网页中飘浮，旋转还是3d效果

最新推荐文章于 2019-04-25 09:59:58 发布

转载最新推荐文章于 2019-04-25 09:59:58 发布 · 965 阅读

文章标签：

#function #timer #opera #behavior #image #javascript

本文介绍了一种使用JavaScript和VML实现的3D图片轮播效果。通过预定义的图片数组和链接，创建了一个可以自动旋转展示的3D轮播图，并支持不同浏览器的兼容性。文中详细解释了初始化设置、图片移动、位置检查等功能。

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< p >    < style type ="text/css" >

v:* { behavior: url(#default#VML); }</style><SCRIPT>

// 3D-Slideshow

// more javascript from http://www.99new.com.cn

var slideurl=new Array()

slideurl[0]="http://www.google.cn/intl/zh-CN/images/logo_cn.gif"

slideurl[1]="http://www.google.cn/intl/zh-CN/images/logo_cn.gif"

slideurl[2]="http://www.google.cn/intl/zh-CN/images/logo_cn.gif"

// add a corresponding link for each image

// if you don't wont to link an image, enter "#"

var slidelink=new Array()

slidelink[0]="http://www.99new.com.cn"

slidelink[1]="http://www.99new.com.cn"

slidelink[2]="http://www.99new.com.cn"

// add a corresponding target for each link

// acceptable values "_blank" or "_top" or "_parent" or "_self"

var slidetarget=new Array()

slidetarget[0]="_blank"

slidetarget[1]="_self"

slidetarget[2]="_top"

// set the width of the 3D-border (pixels)

var backdepth=6

// set thecolorof the 3D-border (HTML-values required)

var fillcolor="#666666"

// set the standstill (seconds) for the images (required for Netscape Navigator)

var standstill=3

// set the form of the imageframe

// acceptable values are "oval" or "rect"

var imageform="oval"

// do not edit below this line

var slidewidth=1

var slideheight=1

var ns6=document.getElementById&&!document.all?1:0

var opera=navigator.userAgent.match(/Opera/)

var ie5=document.getElementById&&document.all&&!opera?1:0

standstill*=1000

var floatingspeed=1

var tempo=20

var numberofimages=slideurl.length-1

var stepx=new Array()

var stepy=new Array()

for (i=0;i<=numberofimages;i++) {

stepx[i]=randommakerNS(floatingspeed)

stepy[i]=randommakerNS(floatingspeed)

}

var imgwidth=new Array()

var imgheight=new Array()

for (i=0;i<=numberofimages;i++) {

imgwidth[i]=10

imgheight[i]=10

}

var x,y

var marginbottom

var marginleft=0

var margintop=0

var marginright

var timer

var i_fadestrength=new Array()

var i_fadestep=new Array()

var i_fadenow=new Array()

var i_fadenowmax=new Array()

for (i=0;i<=slideurl.length;i++) {

i_fadenowmax[i]=2

i_fadestrength[i]=randommakerNS(99)

i_fadestep[i]=1

i_fadenow[i]=0

}

var spancontent=new Array()

var i_spancontent=0

var imgpreload=new Array()

for (i=0;i<=slideurl.length;i++) {

imgpreload[i]=new Image()

imgpreload[i].src=slideurl[i]

}

for (i=0;i<=numberofimages;i++) {

spancontent[i]="<a href='"+slidelink[i]+"' target='"+slidetarget[i]+"'><img src='"+slideurl[i]+"' border='0'></a>"

}

var i_angle1=0

var i_size=1

var i_pic=0

var posleft=0

var postop=0

var x_extrusionangle=0

var y_extrusionangle=0

var x_rotationcenter=0

var y_rotationcenter=0

var pagewidth

var pageheight

function initNS() {

marginbottom=window.innerHeight-11

marginright=window.innerWidth-11

var thisspan=document.getElementById('span0')

thisspan.innerHTML=spancontent[0]

var thisspan=document.getElementById('span0')

imgwidth[0]=parseInt(thisspan.offsetWidth)

imgheight[0]=parseInt(thisspan.offsetHeight)

var maxleftstart=marginright-imgwidth[0]

var maxtopstart=marginbottom-imgheight[0]

var thisspan=document.getElementById('span0').style

thisspan.left=parseInt(thisspan.left)+randommakerNS(maxleftstart)

thisspan.top=parseInt(thisspan.top)+randommakerNS(maxtopstart)

thisspan.visibility="visible"

checkmovementNS()

}

function randommakerNS(range) {

rand=Math.floor(range*Math.random())

if (rand==0) {rand=Math.ceil(range/2)}

return rand

}

function checkmovementNS() {

checkpositionNS()

movepicturesNS()

timer=setTimeout("checkmovementNS()",tempo)

}

function movepicturesNS() {

var thisspan=document.getElementById('span0').style

thisspan.left=parseInt(thisspan.left)+stepx[0]

thisspan.top=parseInt(thisspan.top)+stepy[0]

i_fadenow[0]++

if (i_fadenow[0]>=i_fadenowmax[0]) {

i_fadenow[0]=0

if (i_fadestrength[0]>=100) {i_fadestep[0]=i_fadestep[0]*-1}

else if (i_fadestrength[0]<=0) {

i_fadestep[0]=i_fadestep[0]*-1

i_spancontent++

if (i_spancontent>=spancontent.length) {i_spancontent=0}

document.getElementById('span0').innerHTML=spancontent[i_spancontent]

}

i_fadestrength[0]+=i_fadestep[0]

document.getElementById('span0').style.MozOpacity=Math.round(i_fadestrength[0])/100

}

function checkpositionNS() {

imgwidth[0]=parseInt(document.getElementById('span0').offsetWidth)

imgheight[0]=parseInt(document.getElementById('span0').offsetHeight)

var thisspan=document.getElementById('span0').style

var leftx=parseInt(thisspan.left)

var topy=parseInt(thisspan.top)

if (leftx>marginright-imgwidth[0]-floatingspeed) {

thisspan.left=leftx-Math.abs(stepx[0]+1)

stepx[0]=randommakerNS(floatingspeed)*-1

}

if (leftx<marginleft) {

thisspan.left=leftx+Math.abs(stepx[0])

stepx[0]=randommakerNS(floatingspeed)

}

if (topy>marginbottom-imgheight[0]-floatingspeed) {

thisspan.top=topy-Math.abs(stepy[0])

stepy[0]=randommakerNS(floatingspeed)*-1

}

if (topy<margintop) {

thisspan.top=topy+Math.abs(stepy[0])

stepy[0]=randommakerNS(floatingspeed)

}

function initIE() {

var i_preload=0

for (i=0;i<=slideurl.length-1;i++) {

var imgref=eval("document.n"+i)

if (imgref.complete) {i_preload++}

}

if (i_preload>=slideurl.length-1) {

slidewidth=document.getElementById('spn1').offsetWidth

slideheight=document.getElementById('spn1').offsetHeight

pagewidth=document.body.clientWidth

pageheight=document.body.clientHeight

document.getElementById('rectid').style.width=slidewidth

document.getElementById('rectid').style.height=slideheight

posleft=(pagewidth-slidewidth)/2

postop=(pageheight-slideheight)/2

x_rotationcenter=(posleft/slidewidth)/2

y_rotationcenter=(postop/slideheight)/2

var rotationcenter=0+","+y_rotationcenter+","+x_rotationcenter

document.getElementById('rectid').style.left=posleft

document.getElementById('rectid').style.top=postop

document.getElementById('extrusionid').rotationcenter=rotationcenter

rotateIE()

}

else {

var timer=setTimeout("initIE()",200)

}

function rotateIE() {

i_angle1+=1

if (i_angle1>=360) {

i_angle1=0

}

if (i_angle1==127) {

i_pic++

if (i_pic>=slideurl.length) {i_pic=0}

document.getElementById('fillid').src=slideurl[i_pic]

}

document.getElementById('rectid').style.rotation=i_angle1

document.getElementById('extrusionid').rotationangle=i_angle1+","+i_angle1

var timer=setTimeout("rotateIE()",30)

}

function openpageIE() {

if (slidetarget[i_pic]=="_blank") {

window.open(slidelink[i_pic])

}

else if (slidetarget[i_pic]=="_self") {

document.location.href(slidelink[i_pic])

}

else if (slidetarget[i_pic]=="_top" || slidetarget[i_pic]=="_parent") {

top.location.href(slidelink[i_pic])

}

if (ns6) {

document.write("<span id='span0' style='position:absolute;top:0px;left:0px;filter:alpha(opacity=0);-moz-opacity:0'></span>")

document.close()

window.onload=initNS

}

if (ie5) {

document.write('<div id="preloadimages" style="position:absolute;left:0px;top:-5px;visibility:hidden">')

for (i=0;i<=slideurl.length-1;i++) {

document.write('<span id="spn'+i+'" style="position:absolute;width:2px;left:0px;top:0px;">')

document.write('<img src="'+slideurl[i]+'" name="n'+i+'">')

document.write('</span>')

}

document.write('</div>')

document.write('<v:'+imageform+' id="rectid" style="position:absolute;top:0;left:0;width:'+slidewidth+';height:'+slideheight+'" onClick="openpageIE()">')

document.write('<v:extrusion id="extrusionid" on="true" type="perspective" color="'+fillcolor+'" rotationcenter="0,0,0" backdepth="'+backdepth+'" diffusity="2.5" metal="true">')

document.write('</v:extrusion>')